cpufreq: ondemand: fix timer-related list corruption in store_powersave_bias()

The dbs_timer_init() call in store_powersave_bias() re-initializes the
dbs_info workqueue, call on dbs_timer_exit() to ensure
outstanding work is cleared prior to making this call. Also, grab the
percpu timer_mutex lock to avoid race conditions with respect to the
dbs timer.

Change-Id: I79f3d43eeb51d2d8e21edd0fe043d6583333951f
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>
cpufreq: ondemand: add sysfs entry for down_diff_multi_core

This change adds sysfs entry for the ondemand governor's attribute
down_differential_multi_core. This is required to be able to program
this knob to attain better perf/power for use cases like camcorder.

CRs-fixed: 561456
Change-Id: Ib7c1223215c6b714c286c231ed37f3abfae741c6
Signed-off-by: Krishna Vanka <kvanka@codeaurora.org>
cpufreq: conservative: Fix typos in comments

Fix a couple of typos in comments.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: conservative: Fix sampling_down_factor functionality

sampling_down_factor tunable is unused since commit
8e677ce83bf41ba9c74e5b6d9ee60b07d4e5ed93 (4 years ago).

This patch restores the original functionality and documents the
tunable.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: conservative: Fix the logic in frequency decrease checking

When we evaluate the CPU load for frequency decrease we have to compare
the load against down_threshold. There is no need to subtract 10 points
from down_threshold.

Instead, we have to use the default down_threshold or user's selection
unmodified.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: conservative: Use an inline function to evaluate freq_target

Use an inline function to evaluate freq_target to avoid duplicate code.

Also, define a macro for the default frequency step.

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq: conservative: Update CPU utilization

Update CPU utilization for use in dynamic hotplug driver

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
cpufreq: conservative: First check if we can further reduce the freq

Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
cpufreq: conservative: fix requested_freq reduction issue

When decreasing frequency, requested_freq may be less than
freq_target, So requested_freq minus freq_target may be negative,
But reqested_freq's unit is unsigned int, then the negative result
will be one larger interger which may be even higher than
requested_freq.

This patch is to fix such issue. when result becomes negative,
set requested_freq as the min value of policy.

Signed-off-by: Xiaoguang Chen <chenxg@marvell.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
lib/memcopy: use glibc version

the kernel's memcpy and memmove is very inefficient. But the glibc version is
quite fast, in some cases it is 10 times faster than the kernel version. So I
introduce some memory copy macros and functions of the glibc to improve the
kernel version's performance.

The strategy of the memory functions is:
1. Copy bytes until the destination pointer is aligned.
2. Copy words in unrolled loops.  If the source and destination are not
   aligned in the same way, use word memory operations, but shift and merge
   two read words before writing.
3. Copy the few remaining bytes.

Signed-off-by: Miao Xie <miaox*******>

Conflicts:

	lib/Makefile
lib/string: use glibc version

the performance of memcpy and memmove of the general version is very
inefficient, this patch improved them.

Signed-off-by: Miao Xie <miaox*******>

Conflicts:

	lib/string.c
SCHEDULER: Autogroup patch group by current user android UID instead of task ID
clocks-8960: gpu: add 180 freq and fix caf compatibility for kcontrol

Conflicts:

	arch/arm/mach-msm/clock-8960.c
ARM: add auto hotplug driver

Conflicts:

	arch/arm/mach-msm/Kconfig
Merge branch 'normal-ak2' of https://github.com/raden/aufa_kernel into normal-ak2